Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [80,10,Mod(1,80)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(80, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([0, 0, 0]))
N = Newforms(chi, 10, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("80.1");
S:= CuspForms(chi, 10);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 80 = 2^{4} \cdot 5 \) |
| Weight: | \( k \) | \(=\) | \( 10 \) |
| Character orbit: | \([\chi]\) | \(=\) | 80.a (trivial) |
Newform invariants
comment: select newform
sage: f = N[0] # Warning: the index may be different
gp: f = lf[1] \\ Warning: the index may be different
| Self dual: | yes |
| Analytic conductor: | \(41.2028668931\) |
| Analytic rank: | \(0\) |
| Dimension: | \(2\) |
| Coefficient field: | \(\Q(\sqrt{6049}) \) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{2} - x - 1512 \)
|
| Coefficient ring: | \(\Z[a_1, a_2, a_3]\) |
| Coefficient ring index: | \( 2^{2} \) |
| Twist minimal: | no (minimal twist has level 40) |
| Fricke sign: | \(-1\) |
| Sato-Tate group: | $\mathrm{SU}(2)$ |
$q$-expansion
comment: q-expansion
sage: f.q_expansion() # note that sage often uses an isomorphic number field
gp: mfcoefs(f, 20)
Coefficients of the \(q\)-expansion are expressed in terms of \(\beta = 2\sqrt{6049}\). We also show the integral \(q\)-expansion of the trace form.
Embeddings
For each embedding \(\iota_m\) of the coefficient field, the values \(\iota_m(a_n)\) are shown below.
For more information on an embedded modular form you can click on its label.
comment: embeddings in the coefficient field
gp: mfembed(f)
| Label | \(\iota_m(\nu)\) | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1.1 |
|
0 | −109.551 | 0 | 625.000 | 0 | 9209.37 | 0 | −7681.66 | 0 | ||||||||||||||||||||||||
| 1.2 | 0 | 201.551 | 0 | 625.000 | 0 | −2301.37 | 0 | 20939.7 | 0 | |||||||||||||||||||||||||
Atkin-Lehner signs
| \( p \) | Sign |
|---|---|
| \(2\) | \(1\) |
| \(5\) | \(-1\) |
Inner twists
This newform does not admit any (nontrivial) inner twists.
Twists
| By twisting character orbit | |||||||
|---|---|---|---|---|---|---|---|
| Char | Parity | Ord | Mult | Type | Twist | Min | Dim |
| 1.a | even | 1 | 1 | trivial | 80.10.a.h | 2 | |
| 4.b | odd | 2 | 1 | 40.10.a.b | ✓ | 2 | |
| 5.b | even | 2 | 1 | 400.10.a.o | 2 | ||
| 5.c | odd | 4 | 2 | 400.10.c.o | 4 | ||
| 8.b | even | 2 | 1 | 320.10.a.o | 2 | ||
| 8.d | odd | 2 | 1 | 320.10.a.p | 2 | ||
| 12.b | even | 2 | 1 | 360.10.a.a | 2 | ||
| 20.d | odd | 2 | 1 | 200.10.a.d | 2 | ||
| 20.e | even | 4 | 2 | 200.10.c.e | 4 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 40.10.a.b | ✓ | 2 | 4.b | odd | 2 | 1 | |
| 80.10.a.h | 2 | 1.a | even | 1 | 1 | trivial | |
| 200.10.a.d | 2 | 20.d | odd | 2 | 1 | ||
| 200.10.c.e | 4 | 20.e | even | 4 | 2 | ||
| 320.10.a.o | 2 | 8.b | even | 2 | 1 | ||
| 320.10.a.p | 2 | 8.d | odd | 2 | 1 | ||
| 360.10.a.a | 2 | 12.b | even | 2 | 1 | ||
| 400.10.a.o | 2 | 5.b | even | 2 | 1 | ||
| 400.10.c.o | 4 | 5.c | odd | 4 | 2 | ||
Hecke kernels
This newform subspace can be constructed as the kernel of the linear operator
\( T_{3}^{2} - 92T_{3} - 22080 \)
acting on \(S_{10}^{\mathrm{new}}(\Gamma_0(80))\).
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{2} \)
|
| $3$ |
\( T^{2} - 92T - 22080 \)
|
| $5$ |
\( (T - 625)^{2} \)
|
| $7$ |
\( T^{2} - 6908 T - 21194208 \)
|
| $11$ |
\( T^{2} - 8080 T - 650423376 \)
|
| $13$ |
\( T^{2} + \cdots + 1596545892 \)
|
| $17$ |
\( T^{2} + \cdots + 4705707300 \)
|
| $19$ |
\( T^{2} + \cdots + 40779913424 \)
|
| $23$ |
\( T^{2} + \cdots - 1912065852768 \)
|
| $29$ |
\( T^{2} + \cdots + 3590091179076 \)
|
| $31$ |
\( T^{2} + \cdots + 18175848222720 \)
|
| $37$ |
\( T^{2} + \cdots - 52017173403036 \)
|
| $41$ |
\( T^{2} + \cdots - 767462172871932 \)
|
| $43$ |
\( T^{2} + \cdots + 572587094218848 \)
|
| $47$ |
\( T^{2} + \cdots - 203650755299584 \)
|
| $53$ |
\( T^{2} + \cdots + 25\!\cdots\!16 \)
|
| $59$ |
\( T^{2} + \cdots - 11\!\cdots\!52 \)
|
| $61$ |
\( T^{2} + \cdots + 75\!\cdots\!40 \)
|
| $67$ |
\( T^{2} + \cdots + 354007255197152 \)
|
| $71$ |
\( T^{2} + \cdots + 26\!\cdots\!60 \)
|
| $73$ |
\( T^{2} + \cdots - 16\!\cdots\!88 \)
|
| $79$ |
\( T^{2} + \cdots + 33\!\cdots\!80 \)
|
| $83$ |
\( T^{2} + \cdots - 20\!\cdots\!32 \)
|
| $89$ |
\( T^{2} + \cdots - 10\!\cdots\!36 \)
|
| $97$ |
\( T^{2} + \cdots - 21\!\cdots\!04 \)
|
| show more | |
| show less |